129814823 has 4 divisors (see below), whose sum is σ = 130025160. Its totient is φ = 129604488.

The previous prime is 129814819. The next prime is 129814837. The reversal of 129814823 is 328418921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328418921 = 6043 ⋅54347.

It is a cyclic number.

It is not a de Polignac number, because 129814823 - 2² = 129814819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129814123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104240 + ... + 105477.

It is an arithmetic number, because the mean of its divisors is an integer number (32506290).

Almost surely, 2^129814823 is an apocalyptic number.

129814823 is a deficient number, since it is larger than the sum of its proper divisors (210337).

129814823 is an equidigital number, since it uses as much as digits as its factorization.

129814823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210336.

The product of its digits is 27648, while the sum is 38.

The square root of 129814823 is about 11393.6308084824. The cubic root of 129814823 is about 506.3390570756.

The spelling of 129814823 in words is "one hundred twenty-nine million, eight hundred fourteen thousand, eight hundred twenty-three".